A slotted conical face seal structure

Abstract

The application discloses a slotted conical surface sealing structure, comprising a first body and a second body; the first body comprises an inner conical surface, and the second body comprises an outer conical surface; the inner conical surface and the outer conical surface are butted to form a conical surface sealing area; wherein a groove is arranged along the circumferential direction of the inner conical surface or the outer conical surface, and the groove separates the conical surface sealing area into at least two sub-sealing areas. In this way, on the one hand, by arranging the groove on the surface of the inner conical surface or the outer conical surface, a plurality of sealing rings can be formed between the first body and the second body, so that even if one of the sealing rings is scratched, the butting part of the first body and the second body will not leak, thereby improving the probability of sealing failure. On the other hand, since the edge of the groove can form a stress concentration area, the sealing performance of the line contact part between the inner conical surface or the outer conical surface and the edge of the groove is higher than that of other surface contact parts, thereby improving the sealing performance between the inner conical surface and the outer conical surface.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of connecting structure, and particularly relates to a slotted conical surface sealing structure. BACKGROUND

[0002] In various engineering fields such as aerospace, special vehicles, marine vessels, oil and gas, pipeline systems are distributed in power systems, braking systems, cooling systems and lubrication systems, and the pipeline system is an important part of these engineering fields and an important link to ensure the normal operation of these mechanical systems. If pipeline leakage occurs, it may cause huge economic losses, environmental pollution, and even endanger human life and safety, so the sealing of the pipeline system is a very important engineering problem.

[0003] In various pipeline systems, there are a large number of static sealing structures, such as clamp sealing structures, hollow bolt sealing structures, conical surface sealing structures and flange sealing structures. Among them, the conical surface sealing structure has the characteristics of simple and reliable structure, convenient installation and operation, and strong universality, and is widely used in engineering. For example, in the field of aerospace, some pressure instruments and meters, household pipeline systems, hydraulic pipeline systems of hydraulic cylinders, and other occasions involving the transmission of hydraulic, pneumatic or liquid, the conical surface sealing structure is the most commonly used sealing structure in the pipeline system.

[0004] However, under harsh conditions such as vibration, the conical surface sealing structure has the problem of easy sealing failure due to scratches between the conical surfaces. For example, once the conical surface sealing structure in the pipeline system of an aircraft engine leaks, a small amount of liquid may seep out, or even oil may drip. This brings great safety hazards to the aircraft and significantly affects the reliability of the aircraft. Therefore, how to improve the sealing performance of the conical surface sealing structure under harsh conditions such as vibration is a technical problem that needs to be solved at present. SUMMARY

[0005] The application provides a slotted conical surface sealing structure that can improve the sealing effect of the conical surface sealing structure.

[0006] The slotted conical surface sealing structure provided by the application comprises a first body and a second body; the first body comprises an inner conical surface, and the second body comprises an outer conical surface; the inner conical surface and the outer conical surface are butted to form a conical surface sealing area; wherein a groove is provided along the circumferential direction of the inner conical surface or the outer conical surface, and the groove separates the conical surface sealing area into at least two sub-sealing areas.

[0007] In one implementation manner, the groove is located on the inner conical surface or the outer conical surface close to the small conical end side.

[0008] In an implementation, the number of the grooves is one or more.

[0009] In an implementation, when the number of the grooves is one, a width of the groove is not less than a first width threshold and not greater than a second width threshold; the first width threshold is one-eighth of a length of the generatrix of the conical sealing area, and the second width threshold is one-third of the length of the generatrix of the conical sealing area.

[0010] In an implementation, when the number of the grooves is more than one, the grooves are arranged along a length direction of the generatrix of the inner or outer conical surface.

[0011] In an implementation, a total width of all the grooves is not less than a first width threshold and not greater than a second width threshold; the first width threshold is one-eighth of a length of the generatrix of the conical sealing area, and the second width threshold is one-third of the length of the generatrix of the conical sealing area.

[0012] In an implementation, when the inner and outer conical surfaces have different hardness, the grooves are formed on the conical surface with greater hardness.

[0013] In an implementation, a cross section of the groove is rectangular, and a depth direction of the groove is perpendicular to the generatrix of the inner or outer conical surface.

[0014] In an implementation, a fastener is further included for fastening the abutment of the inner and outer conical surfaces.

[0015] In an implementation, the first body is a first pipe joint, the second body is a second pipe joint, and the fastener is a sleeve nut; one end of the sleeve nut is provided with an internal thread, and the other end of the sleeve nut is provided with an internal clamping portion; an external clamping portion matched with the internal clamping portion is arranged on an external surface of the first pipe joint, and an external thread matched with the internal thread is arranged on an external surface of the second pipe joint; the sleeve nut is sleeved outside the abutment of the first pipe joint and the second pipe joint, wherein, after the internal clamping portion and the external clamping portion are clamped, the extrusion force between the inner and outer conical surfaces is changed through the threaded connection of the internal thread and the external thread.

[0016] In summary, the slotted conical surface sealing structure provided by the application has the following beneficial effects: on the one hand, by opening grooves on the surface of the inner conical surface or the outer conical surface, a plurality of sealing rings can be formed between the first body and the second body, so that even if one of the sealing rings is scratched, the abutment between the first body and the second body will not leak, thereby improving the probability of sealing failure. On the other hand, since the edges of the grooves can form stress concentration areas, the sealing performance of the line contact area between the inner conical surface or the outer conical surface and the groove edges is higher than that of the other surface contact areas, thereby improving the sealing performance between the inner conical surface and the outer conical surface. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0018] Figure 1 A structure diagram of a slotted conical surface sealing structure provided by an embodiment of the present application;

[0019] Figure 2 A structure diagram of a slotted conical surface sealing structure provided by an embodiment of the present application; Figure 1 A local enlarged view of M in the middle;

[0020] Figure 3 A structure diagram of a slotted conical surface sealing structure provided by an embodiment of the present application;

[0021] Explanation of reference signs

[0022] 10-first body, 20-second body, 30-conical surface sealing area, 40-groove, 50-outer sleeve nut;

[0023] 101-inner conical surface, 102-outer clamping part, 201-outer conical surface, 202-outer thread, 301-sub sealing area, 501-inner thread, 502-inner clamping part. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] Reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0026] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0027] In this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0028] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0029] Figure 1 This is a schematic diagram of a slotted conical sealing structure provided in an embodiment of this application. Figure 2 for Figure 1 A magnified view of a section at point M. (See image below.) Figure 1 and Figure 2 As shown, the slotted conical sealing structure provided in this embodiment includes a first body 10 and a second body 20. The first body 10 includes an inner conical surface 101, and the second body 20 includes an outer conical surface 201. After the inner conical surface 101 and the outer conical surface 201 are mated, a conical sealing region 30 is formed. A groove 40 is provided circumferentially along the inner conical surface 101 or the outer conical surface 201, dividing the conical sealing region 30 into at least two sub-sealing regions 301.

[0030] The slotted conical surface sealing structure provided by the embodiments of the present application has the following beneficial effects: on the one hand, by opening the annular groove 40 on the surface of the inner conical surface 101 or the outer conical surface 201, a plurality of sealing rings can be formed between the first body and the second body, so that even if one of the sealing rings is scratched, the first body and the second body will not leak at the joint, thereby improving the probability of sealing failure. On the other hand, since the edges of the groove 40 can form a stress concentration area (referred to as a line contact area in the present application), the sealing performance of the line contact area of the inner conical surface 101 or the outer conical surface 201 and the edges of the groove 40 is higher than that of other surface contact areas, thereby improving the sealing performance between the inner conical surface 101 and the outer conical surface 201.

[0031] The sealing performance of the slotted conical surface sealing structure provided by the embodiments of the present application will be described below in combination with Figure 1 and Figure 3 .

[0032] Figure 3 Another conical surface sealing structure is provided. In this structure, Figure 3 and Figure 1 the conical surface sealing structure shown is basically the same, except that Figure 3 the inner conical surface 101 and the outer conical surface 201 of the conical surface sealing structure are not provided with the groove 40. In this way, Figure 3 the conical surface sealing structure shown in the structure forms a complete conical surface sealing area after the inner conical surface 101 and the outer conical surface 201 are connected. Therefore, the complete conical surface sealing area is equivalent to one sealing ring between the first body 10 and the second body 20.

[0033] In summary, compared with Figure 3 the conical surface sealing structure, the slotted conical surface sealing structure provided by the embodiments of the present application has the following beneficial effects: on the one hand, by opening the annular groove 40 on the surface of the inner conical surface 101 or the outer conical surface 201, a plurality of sealing rings can be formed between the first body and the second body, so that even if one of the sealing rings is scratched, the first body and the second body will not leak at the joint, thereby improving the probability of sealing failure. On the other hand, since the edges of the groove 40 can form a stress concentration area (referred to as a line contact area in the present application), the sealing performance of the line contact area of the inner conical surface 101 or the outer conical surface 201 and the edges of the groove 40 is higher than that of other surface contact areas, thereby improving the sealing performance between the inner conical surface 101 and the outer conical surface 201.

[0034] In some embodiments, the inner conical surface 101 and the outer conical surface 201 are coaxial, which can better realize the connection of the inner conical surface 101 and the outer conical surface 201 and form a conical surface sealing area.

[0035] In some embodiments, the groove 40 is opened on the inner conical surface 101 or the outer conical surface 201 close to the small conical end side.

[0036] As shown in Figure 1 The inner taper surface 101 and the outer taper surface 201 each include two ends with different diameters. In the embodiment, the end with the smaller diameter of the inner taper surface 101 and the outer taper surface 201 is referred to as the small taper end, and the end with the larger diameter of the inner taper surface 101 and the outer taper surface 201 is referred to as the large taper end.

[0037] As shown in Figure 2 For example, the recess 40 is arranged on the outer taper surface 201. The length of the generatrix of the outer taper surface 201 is L, and the length of the generatrix of the taper sealing area 30 is L1. In the embodiment, the side from the midpoint of L1 to the small taper end is referred to as the side close to the small taper end, and the side from the midpoint of L1 to the large taper end is referred to as the side close to the large taper end. That is, in the embodiment, the recess 40 can be arranged on the side from the midpoint of L1 to the small taper end, that is, the recess 40 is arranged on the side close to the small taper end.

[0038] Arranging the recess 40 on the side close to the small taper end can obtain greater stress at the edge of the recess 40, thereby obtaining better sealing performance.

[0039] In some embodiments, the width W of the recess 40 is not less than a first width threshold and not greater than a second width threshold; the first width threshold is one-eighth of the length of the generatrix of the taper sealing area 30, and the second width threshold is one-third of the length of the generatrix of the taper sealing area 30.

[0040] Figure 2 For Figure 1 the local enlarged view of the middle M. As shown in Figure 2 For example, the recess 40 is arranged on the outer taper surface 201. The length of the generatrix of the outer taper surface 201 is L, and the length of the generatrix of the taper sealing area 30 is L1, so that the width W of the recess 40 is greater than or equal to one-eighth of L1 and not greater than one-third of L1.

[0041] If the width W of the recess 40 is too small, it is difficult to form stress concentration at the edge of the recess 40; if the width W of the recess 40 is too large, the actual contact area of the inner taper surface 101 and the outer taper surface 201 is small, which leads to a small effective sealing area and affects the sealing performance. Therefore, in the embodiment, the width W of the recess 40 is not less than the first width threshold and not greater than the second width threshold, so that the recess 40 arranged in this way can not only ensure a sufficient effective sealing area, but also form sufficient stress, thereby improving the sealing performance between the first main body 10 and the second main body 20.

[0042] The number of the recess 40 is not limited in the embodiment, and the number of the recess 40 can be one or multiple.

[0043] In the case that the number of the grooves 40 is multiple, the multiple grooves 40 are arranged along the length direction of the generatrix of the inner taper surface 101 or the outer taper surface 201. In this way, the multiple grooves 40 can divide the taper sealing area 30 into more independent sub-sealing areas 301, so that more sealing rings can be formed between the first body 10 and the second body 20.

[0044] However, opening more grooves 40 will affect the strength of the inner taper surface 101 or the outer taper surface 201 where the grooves 40 are opened. Therefore, in order to ensure the strength of the inner taper surface 101 or the outer taper surface 201 and at the same time improve the sealing performance between the first body 10 and the second body 20 as much as possible, in the embodiments of the present application, the total width of all the grooves 40 is not less than a first width threshold and not greater than a second width threshold. The first width threshold is one-eighth of the length of the generatrix occupied by the taper sealing area 30, and the second width threshold is one-third of the length of the generatrix occupied by the taper sealing area 30.

[0045] The embodiments of the present application do not limit the shape and angle of the grooves 40. For example, the cross section of the groove 40 can be rectangular, and the depth direction of the groove 40 is perpendicular to the generatrix of the inner taper surface 101 or the outer taper surface 201.

[0046] The cross section of the groove 40 refers to the shape enclosed by the profile of the groove 40 after being cut along the axis of the inner taper surface 101 or the outer taper surface 201.

[0047] In some embodiments, the hardness of the inner taper surface 101 and the outer taper surface 201 is the same, for example, the inner taper surface 101 and the outer taper surface 201 are made of the same material.

[0048] In some embodiments, the hardness of the inner taper surface 101 and the outer taper surface 201 is different. In this case, the groove 40 can be opened on the taper surface of the one with greater hardness between the inner taper surface 101 and the outer taper surface 210. In this way, the groove 40 is opened on the taper surface with greater hardness, which is less likely to deform, so as to better form stress concentration at the edge of the groove 40.

[0049] For example, the hardness of the inner taper surface 101 is greater than that of the outer taper surface 201, in which case the groove 40 can be provided on the inner taper surface 101.

[0050] It should be noted that the embodiments of the present application do not limit the structure of the first body 10 and the second body 20. For example, the first body 10 and the second body 20 can be solid or hollow structures. When the first body 10 and the second body 20 are both hollow structures, the slotted taper sealing structure provided by the embodiments of the present application can be used as a pipe joint of a pipeline system.

[0051] When the slotted conical surface sealing structure provided by the embodiments of the present application is used as a pipe joint of a pipeline system, a fastener for fastening the abutment of the inner conical surface 101 and the outer conical surface 201 can be further included.

[0052] The embodiments of the present application do not limit the specific implementation of the fastener, as long as it can fasten the abutment of the inner conical surface 101 and the outer conical surface 201. For example, the fastener can be a sleeve nut 50.

[0053] The slotted conical surface sealing structure provided by the embodiments of the present application will be exemplarily described below as a pipe joint of a pipeline system, taking the fastener as the sleeve nut 50.

[0054] When the slotted conical surface sealing structure provided by the embodiments of the present application is used as a pipe joint of a pipeline system, the first body 10 can be a first pipe joint, and the second body 20 can be a second pipe joint.

[0055] In combination with FIGS. 1-4, Figure 1 and Figure 3 As shown in FIGS. 1-4, one end of the sleeve nut 50 is provided with an inner thread 501, and the other end of the sleeve nut 50 is provided with an inner clamping portion 502. The outer surface of the first pipe joint is provided with an outer clamping portion 102 matched with the inner clamping portion 502, and the outer surface of the second pipe joint is provided with an outer thread 202 matched with the inner thread 501.

[0056] In this way, after the inner conical surface 101 of the first pipe joint is abutted with the outer conical surface 201 of the second pipe joint, the sleeve nut 50 is sleeved outside the abutment of the first pipe joint and the second pipe joint. After the sleeve nut 50 is sleeved, the inner clamping portion 502 is clamped with the outer clamping portion 102, and the inner thread 501 is threadedly connected with the outer thread 202. In this way, the extrusion force between the inner conical surface 101 and the outer conical surface 201 can be changed through the thread connection between the inner thread 501 and the outer thread 202. With the increase of the extrusion force between the inner conical surface 101 and the outer conical surface 201, a sufficient stress is formed at the edge of the groove 40, so that two line seals can be formed in the conical surface sealing area, thereby improving the sealing performance between the first pipe joint and the second pipe joint.

[0057] It should be understood that although the content disclosed in the present application is introduced according to one or more examples, each embodiment described in the present application can be an independent scheme or can be combined according to the inherent logic, and these schemes all fall within the protection scope of the present application.

[0058] For example, the groove type conical surface sealing structure provided by the embodiments of the present application can also be provided on the inner conical surface or the outer conical surface close to the small conical end side, and the width of the groove is not less than the first width threshold and not greater than the second width threshold. For another example, the groove type conical surface sealing structure provided by the embodiments of the present application can also be provided on the inner conical surface or the outer conical surface close to the small conical end side when the groove type conical surface sealing structure is used as a pipe joint. For another example, the number of the groove provided by the embodiments of the present application can also be one or more when the groove type conical surface sealing structure is used as a pipe joint. The above are only described by several examples, and the following will not be listed one by one. That is, one or several examples disclosed in the above embodiments of the present application can be combined according to the internal logic, and the present application does not limit this.

[0059] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0060] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. According to the above teaching, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

[0061] The present application has been described in detail with reference to specific embodiments and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that the technical solutions and embodiments of the present application can be variously replaced, modified or improved without deviating from the spirit and scope of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

Claims

1. A grooved conical face seal structure, characterized by, The utility model relates to a pipe joint, and particularly relates to a pipe joint with a conical sealing area. The pipe joint comprises: a first body and a second body; the first body comprises an inner conical surface, and the second body comprises an outer conical surface; the inner conical surface and the outer conical surface form a conical sealing area after abutting; a plurality of grooves are arranged along the inner conical surface or the outer conical surface, the grooves are arranged on the inner conical surface or the outer conical surface close to the small conical end side, the plurality of grooves are arranged at intervals along the length direction of the generatrix of the inner conical surface or the outer conical surface, the total width of all the grooves is not less than a first width threshold and not greater than a second width threshold, the first width threshold is one-eighth of the length of the generatrix occupied by the conical sealing area, and the second width threshold is one-third of the length of the generatrix occupied by the conical sealing area; the edges of the grooves form a line contact stress concentration area, and the conical sealing area is divided into at least two sub-sealing areas; 2. The grooved cone seal structure of claim 1 wherein, the cross section of the groove is rectangular, and the depth direction of the groove is perpendicular to the generatrix of the inner conical surface or the outer conical surface.

3. The grooved cone seal structure of claim 1 wherein, In the case where the hardness of the inner conical surface and the outer conical surface is different, the groove is arranged on the conical surface of the one with greater hardness.

4. The grooved conical seal structure of claim 3 wherein, The pipe joint further comprises a fastener for fastening the abutting part of the inner conical surface and the outer conical surface. The first body is a first pipe joint, the second body is a second pipe joint, and the fastener is a sleeve nut; one end of the sleeve nut is provided with an internal thread, and the other end of the sleeve nut is provided with an internal clamping part; the outer surface of the first pipe joint is provided with an external clamping part matched with the internal clamping part, and the outer surface of the second pipe joint is provided with an external thread matched with the internal thread; the sleeve nut is sleeved outside the abutting part of the first pipe joint and the second pipe joint, wherein the internal clamping part is clamped with the external clamping part, the internal thread is threadedly connected with the external thread, and the extrusion force between the inner conical surface and the outer conical surface is changed.

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